مختصر البحث:
This paper presents a review of experimental investigations, the analytical formulations, and
numerical models of (gas-liquid), (gas-solid), (liquid-solid), and (liquid-liquid). Two groups of studies
turbulator and smooth in conventional passages …
This paper presents a review of experimental investigations, the analytical formulations, and
numerical models of (gas-liquid), (gas-solid), (liquid-solid), and (liquid-liquid). Two groups of studies
turbulator and smooth in conventional passages tubes, pipe, and channels conduit are reviewed. Different
aspects such as flow pattern, pressure drop, maps, void fraction, and estimates of the kinetic energy and
momentum are of interest. The need to systematize the huge amount of manuscript published on the multiphase
flow and to understand the limitations of the techniques employed constitutes the motivation for this review.
Predicting flow pattern and transient flow conditions is developed at experiment (photographs, visual
observation, image processing, parallel wire conductance sensor and Particle Image Velocimetry visualization,
Planar Laser-Induced Fluorescence, Simultaneous two-line laser-based, high speed video-camera, Conductivity
needle Probe, and Gamma Densitometer) were used. In two-phase flows, the utmost decisive parameter is the
pressure gradient over the flow. Practically, the major thing for effective processes is a delicate prognostication
for the gradient of pressure over the flow of two-phase. An experimental study was generally obtained using
pressure transducer, and multi-tube manometer. Essentially, different kinds of patterns exist in order to identify
as a drift-flux pattern, homogeneous no-slip flow pattern as well as separated pattern. The numerical solution
has been steady state transitions to the unsteady state cases, which used code or commercial CFD software.
